A biomimetic all-inorganic photocatalyst for the artificial photosynthesis of hydrogen peroxide. Issue 20 (12th September 2022)

• Record Type: Journal Article
• Authors: Teranishi, Miwako; Naya, Shin-ichi; Yan, Yaozong; Soejima, Tetsuro; Kobayashi, Hisayoshi; Tada, Hiroaki
• Is Part Of: Catalysis science & technology. Volume 12:Issue 20(2022)
• Page Start: 6062
• Page End: 6068
• Publication Date: 2022-09-12
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d2cy01089e
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : A photocatalyst with the unit consisting of a single Au particle and an interconnected cluster of SnO2 nanocrystals with the surface modified with SbCl3 stably produces H2 O2 with an external quantum yield of 1.1% at λ ex = 420 nm. Abstract : The artificial photosynthesis of H2 O2 from water and O2 presents a sustainable route for its production. Remarkable progress in the rate of reaction has recently been achieved mainly by using semiconducting organic polymer photocatalysts. In view of the use under harsh oxidative conditions, the development of robust inorganic photocatalysts is highly desired. Here we present a photocatalyst with the unit consisting of a single Au particle and an interconnected cluster of SnO2 nanocrystals with the surface modified with SbCl3 (Au@SnO2 –Sb(iii )). Under visible-light irradiation ( λ ex = 420 nm), Au@SnO2 –Sb(iii ) stably produces H2 O2 with a rate of 6.1 mM g −1 h −1 and an external quantum yield of 1.1%. This striking photocatalytic activity of Au@SnO2 –Sb(iii ) originates from the action of SnO2 –Sb(iii ) as a "light antenna" and "electron transporter", the electrocatalytic activity of Au NPs for the two electron-oxygen reduction reaction, the visible-light induced activity of SnO2 –Sb(iii ) for the oxygen evolution reaction, the weak adsorptivity for H2 O2, and the robustness.